Automatic cut-off for engines



(No Model.)-

J. W. SAGER.

AUTOMATIC GUT-OFF FOR ENGINES. No. 506,943.

' Patented. Oct. 17, 1893. F1 1.

I Almlllmi.

Wit-hassles: InuenEur:

UNITED STATES PATENT OFFICE.

JOHN W. SAGER, OF JOLIET, ILLINOIS.

AUTOMATIC CUT-OFF FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 506,943, dated October17, 1893.

Application filed April 21, 1893.

To all whom it may concern:

Be it known that I, JOHN \VSAGER, a citizen of the United States ofAmerica, residing at Joliet, in the county of Will and State ofIllinois, have invented certain new and useful Improvements in AutomaticOut-Offs for Steam-Engines, of which the following is a specification,reference being had therein to the accompanying drawings and the lettersof reference thereon,forming a part of this specification, in whichFigure 1 is a side elevation of the automatic cut off mechanism appliedto the side of a four valve steam cylinder. Fig. 2 is a side view of oneof the automatic cut off mechanisms shown as detached from the cylinder.Fig. 3 is end view of one of the automatic cut off mechanisms shown asdetached from the cylinder, and being an end view of Fig. 2, and Fig. 4is a side view of the joint of the toggle arms of the device showing aset screw for controlling the angle of said arms with relation to eachother.

This invention relates to certain improvements in an automatic cut offfor steam en-, gines, which improvements are fully set forth andexplained in the following specification and claims.

Referring to the drawings A represents the side of an ordinary fourvalve steam cylinder having a wrist plate B j ournaled on a stud on theside of the cylinder, which wrist plate receives an oscillating motion,from an eccentric located preferably on the main shaft of the engine,through the medium of the eccentric rod D detachably connected to saidwrist plate through the medium of a wrist pin in the ordinary manner.

V is an arm secured to the valve shaft S, and has its outer endpivotally connected to the piston rod G of the dash pot P.

X is an arm pivotally connected to the valve shaft S, and has its outerend pivotally connected to the reach rod E, pivotally connected to thewrist plate B.

a. a are a pair of toggle arms which pivotally connect the outer ends ofarms V and X with each other.

C is an arm journaled at about its center on the valve shaft S betweenarms a and V,

Serial No. 471,281- (No model.)

and is connected with a governor, (not necessary to be shown,) and isprovided on its opposite lower end with a friction roller r on its sidefor engaging the toggle arms a sooner or later, as said arm 0 isoscillated by the governor through the medium of rod H.

O is a set screw for use in regulating the angle of the toggle arms a awith each other to cause them to fold together more or less readily.

F is a reach rod for connecting the cranks J of the exhaust valves withthe wrist plate B.

In operation oscillation of the wrist plate B in the direction of thearrow thereon, will cause arm V, secured to the valve shaft S, to moveupward, through the medium of toggle arms a. a. connecting it with theouter end of arm X and reach rod E, and continue to move upward andcause the valve to admit steam until the toggle arms a. a. come incontact with roller 1" on the lower end of arm 0, which will cause thetoggle arms a. a. to fold together quickly and permit the valve to bequickly closed by means of the dash pot mechanism G. P. connected witharm V and toggle arms a. a. as shown in Fig. l at the right of thefigure. The toggle arms a. a. will be caused to fold sooner or later asthe arm 0 is oscillated by means of the governor. The greater the speedof the governor, the sooner said arm 0 will cause said toggle arms tofold and permit the dash pot mechanism to close the valve and cut offthe admission of steam to the cylinder.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is as follows, to wit:

1. In an automatic cut off for steam engines, the combination of theinlet valve shaft S, arm V secured thereto, arm X journaled thereon,toggle arms a. a. for connecting the outer ends of arms V and X,oscillating arm 0 journaled on said shaft and having friction roller 1"for engaging said toggle arms to cause them to fold, oscillating wristplate B, reach rod E for connecting said wrist plate with arms a and X,and the dash pot mechanism G. P. connected with arms a, V, all arrangedto operate substantially as and for the purpose set forth.

2. In an automatic cut ofi for steam engines, the combination of theinlet valve shaft, an arm secured thereto and connected with a dash potmechanism, an arm journaled adjacent stop for engaging said toggles tocause them to fold all arranged to operate substantially as and for thenurpose set forth. [0

JOHN W. SAGER. 5 thereon and connected with an oscillating Witnesses:

RAY HUTCHINS, THOS. H. HUTCHINS.

wrist plate, toggle arms for connecting the outer ends of said arms, andan adjustable

